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"Around 6:17am a young couple shows up. It's them. I'm sure of it. A little late but still not too late," the embarrassed photographer wrote in a post on Facebook. "They go up onto Hawksbill Crag. Hang out for a few minutes and then it happens.

"Basically I spent six and half hours, $40 ($58) in gas and food, 450 photos, and took the wrong couple's photos," Peters said.

He said he was unable to confirm the couple's identity at the time as was there no phone signal in the mountainous area. Mortified by the error, he took to social media and eventually tracked down the couple he had photographed by accident: David Le and Jenny Pham from Dallas, Texas.

"We love hiking and David was planning this special trip that he wanted to be perfect. Now I know why he was a bit stressed," Pham said.

"The view was breathtaking. He asked me to film the sunrise, which at first I thought was a bit sentimental, then I turned round and he was on one knee holding a ring. It was perfect. It felt like a movie." she added.

Peters described the mishap as "bittersweet", adding: "On one hand I've made one couple's engagement very memorable in a good way and on the other someone didn't get anything."